| 摘要 |
<p>PURPOSE: To instantaneously collect a required measurement data without obstructing a boring work and with labor saving by mutually connecting two tubular members constituted so as to be transmittable and receivable through their screw-cut end parts. CONSTITUTION: A Hall effect sensor 19 is arranged within the cavity of the nose part of the pin 15 of a tubular member 11, and signal conductors 53, 54, electric conductors 55, 56, a flat printed conductor 57 connected thereto, and a lithium battery 41 are provided within the tubular member 11. A coil 33 wound around a ferrite core 35 and an electromagnet 32 which is the assembly of a signal processing circuit 39 are arranged within the inner sleeve 23 of a tubular member 13 by a retaining ring 36. The pin 15 of the tubular member 11 is connected to the box 17 of the tubular member 13 by a screw 18 so as to perform the receipt and transmission of data signals with the box 17.</p> |
